Three officers were present, and two of them fired. The number of shots hasn't been disclosed. A resident in the neighborhood said he heard three or four gunshots just before 11 p.m.

The injured man, who wasn’t named Saturday night, later died at Palomar Medical Center, Griffin said.

When information on the shooting was initially released, police said there was no obvious reason for the man being in the area with a knife. On Sunday afternoon, Griffin provided updated information, noting that that there was evidence the individual had been despondent in recent days. A handwritten letter recovered from the victim's pocket and several text messages on his phone indicated he was considering suicide, Griffin said.

Griffin also released a more detailed account of the events leading up to the shooting, which he said occurred after officers repeatedly tried to persuade the man to drop his weapon.

In a news release, Griffin explained that officers tried unsuccessfully to disarm the man by using a taser. After numerous attempts to convince him to drop his knife, the man suddenly raised it and charged one of the officers, Griffin reported. Two of the officers, he said, fired a total of five times striking the man more than once. When the man fell to the ground the knife was still in his hand.